Linotype-machine.



J. R. MCRAE.

LINOTYPB MACHINE.

APPLICATION FILED uns, 191s.

1 ,088,71 8. Patented Mar. 3, 1914,

RZ/gil 2 SHEETS-SHEET 1.

J. R. MGRAE.

LINOTYPB MACHINE.

APPLICATION FILED APR. s, 1913.

1 ,088,7 1 3. Patented Mar. 3, 1914.

2 SHEETS-SHEET 2.

UNTED i STATES PATENT OFFICE.

JOHN R. MORAE, OF ALBANY, NEW YORK, ASSIGNOR TO MERGENTHALER LINOTYPE COMPANY, A CORPORATION OF NEW YORK.

LINOTYPE-MACHINE.

Specification of Letters Patent.

Patented Mztl. 3, 1914.

Application filed April 5, 1913. Serial No. 759,141.

To all 107mm it may conce/rn.

Be it known that I, JOHN R. MCRAE, a subject of the King' of the United Kingdom of Great Britain and Ireland, residinlsr` at Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Linotype-Machines, of which the following` is a specification, reference being, had therein to the ac rompanying;` drawing.

My invention relates to linotype machines, such for instance as are. represented in Letters Patent of the United States to O. Mergenthaler, No. 557,000, wherein a linotype or slug is cast in a slotted mold, the latter being pressed at its front against a vcomposed line of matrices, and at its rear by the mouth of the melting pot, from which the molten metal is delivered.

parts, and the production of slugs of the exact height required, it is necessary that the two faces of the mold should be closed tightly against the matrices and the pot respectively, and further, that the matrices be crowded tightly against the members whereby they are sustained in line.

It sometimes occurs in practice, and4 particularly at the hands of an inexperienced or careless attendant, that the Various devices mentioned are hindered from closing),- together properly, as for instance if the matrices are not properly alined, or if the mold carrier or wheel does not reach its final position, or because of the accidental accumulation of metal on the parts, or for other reasons. ln such event, and if the pump is permitted to act, there will be a squirt, and the molten metal will be ejected into the operative parts in such manner as to prevent their proper action.

The object of the present invention is to prevent the action of the pump, whenever the pot fails to close tightly against the mold, or the mold fails to close tightly against the matrix line. Similar devices are presented in Letters Patent of the United States to G. A. Vassberg, No. 659,863, and my invention is in effect an improvement on the mechanism therein set forth, and is intended to simplify and render more certain the action of the parts. The principal distinction involved s the mounting of the pump stop on the movable pot itself, thereby In order to secure the proper operation of the insuring;- a more convenient arrangement and 2gfreater accuracy7 in action.

Tn the accompanying drawings, I have shown my invention by way of illustration and in n'eferrcd form, and as applied to the specific type of machine referred to, but obviously many changes and variations may be made therein, and in its mode of application, which will still be comprised within its spirit. Generally speaking', I desire it to be understood that I do not limit myself to any specific form or embodiment, except in so far as such limitations are specified in the claim.

l'n the drawings: Figure 1 is a side view, partly in vertical section, of the casting mechanism, etc., with my invention embodied therein; Fig. 2 is a perspective View ot' a portion of the pump lever and connected parts; and Fig'. 3 is a side View showin a the stop in action.

Referring to the drawings, the matrix line X is supported as usual by the elevator Y in operative relation to the mold A carried by the mold wheel B, which latter is mounted on a horizontally sliding support, so that the meld may be carried forward against the matrix line in order to force the latter against the forward wall of the elevator, thus insuring' its exact alinement and also a close joint between it and the mold.

The melting pot C is arranged to swing forward and backward to and from the mold, these movements being;r controlled by the cam D. The pot is provided with a mouth C1 and with the pump plunger E, by which the delivery of the metal is effected. The plunger E is moved by the lever F, operatively to inject the metal by the spring G, and to its upper or normal position by the cam H. The matrix line X is lowered by the elevator Y into position in front of the mold A, after which the mold and the pot C advance, the parts being4 thus crowded tightly together, so that a close joint is maintained both at the front and rear of the mold.

The parts so far described, and their mode of operation, are or may be substantially similar to those described in the previouslymentioned Letters Patent, or as embodied in the ordinary commercial linotype machine.

in applying my invention, I provide a projecting stop K, and mount the same on the cover or upper portion of the movable pot C. The stop is normally located immediately below the arm or dog` J connected to the lever F (see Fig. 3,) in such manner as to prevent the descent of the lever A'and consequently the injection of the molten metal into the mold. The dog J is preferably pivotally connected to the lever F, and a spring J1 is provided to hold it in its normal position and to permit a slight elastic yield when the dog contacts with the sto-p. f Y

The operation of the parts will now be clearly understood. If the matrix line X, the mold A., and the pot mouth C1 are closed to their operative positions, the stop K on the pot C shifts with the latter and is moved from under the dog J, thereby permittingthe downward movement of the lever F and the injection of the metal, in the customary manner. These positions of the parts are shown in Fig. l. If, however, the pot is kept for any reason from going forward to its proper position, the stop K remains under the dog J, and consequentlyy the downward action of the lever F is arrested and the injection of the metal is prevented. These positions of the parts are shown in Fig. 3. Anything which hinders either the matrices, the mold, or the pot from assuming their proper operative relations, thus obstructs the action of the pump, and thereby averts the formation of a defective slug, or a squirt, or the delivery of molten metal among the parts of the Y machine.

As previously stated, I have shown my invention in preferred form and by way of example, and as applied to a particular 40 type of machine. However, many modifications and variations thereof will suggest themselves to those skilled in the art without departure from its scope.

Having thus described my invention, its construction and mode of operation, what I claim and desire to secure by Letters Patent of the United States, is as follows:

ln a linotype machine, the combination of ythe movable pot and the pump lever therefor, the said pot being provided with a fixed stop or abutment which in one position of the pot engages the pump lever and locks it against action and in another position of the pot frees the pump lever and permits it to operate. Y

In testimony whereof l have aiiiXed my signature in presence of two witnesses.

J CHN R. MCRAE. Y

Witnesses:

JOSEPH CAPLAN, SAMUEL CHArLAN.

Copies of this patent may be obtained for ve cents each, by addressing the Cmlxmisisoner` of Patents.

Washington, D. C. 

